All of malenkiy_scot's Comments + Replies

A bit off-topic:

"A wheel that can be turned though nothing turns with it, is not part of the mechanism" - what about a gyroscope wheel that is a part of a stabilizing mechanism?

This comes to show, IMHO, two things: one should be extremely careful with one's intuitions and examples must not be taken too far.

1pax
If you really wanted to nitpick, you could also point out non-driven wheels on cars. Such a wheel doesn't turn anything useful itself (it is turned but does not turn anything), but it still successfully prevents one end of a vehicle from dragging on the ground, which is its actual purpose. But we're merely amusing ourselves with literalistic counter-examples at this point, as I see you are well aware.

Done.

How real is the research on digit ratio? (On bogus statistics-based research see, for example: http://www.economist.com/news/briefing/21588057-scientists-think-science-self-correcting-alarming-degree-it-not-trouble).

In any case, can you please explain how you plan to use digit ratio data?